html,
body {
    scroll-behavior: smooth;
}

.logo {
    padding: 0 8px;
}

.logo a {
    color: rgb(21, 26, 47);
}

.theme-action i {
    font-size: 18px;
}

.book .navigation-go-top {
    position: fixed;
    right: 50px;
    bottom: 68px;
    background-color: #fafafa;
    border: 1px solid rgba(0, 0, 0, .07);
    border-radius: 1px;
    -webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, .175);
    box-shadow: 0 6px 12px rgba(0, 0, 0, .175);
    background-clip: padding-box;
    z-index: 999;
    cursor: pointer;
    font-size: 12px;
    padding: 8px 10px;
    color: #364149;
    opacity: 60%;
}

.book .navigation-go-top:hover {
    opacity: 100%;
}

.book.color-theme-2 .navigation-go-top {
    background-color: #2d3143;
    border-color: #272a3a;
    color: #bcc1d2;
}
.color-theme-2 .gt-container .gt-header-textarea,
.color-theme-2 .gt-container .gt-comment-content {
    background-color: #2d3143;
    color: #c9d1d9;
}
.color-theme-2 .gt-container .gt-btn-preview {
    background-color: #2d3143;
    border-color: #4c5276;
    color: #bcc1d2;
}
.color-theme-2 .gt-container .gt-header-textarea:hover {
    color: #272a3a;
}
.color-theme-2 .logo a {
    color: white;
}
.footer {
    padding: 22px 0;
    text-align: center;
    border-top: 1px solid hsla(210, 18%, 87%, 1);
    color: #464d69;
}

.footer .link {
    color: #464d69;
}

.footer .link:hover {
    color: #6d7491;
}

.color-theme-2 .footer {
    border-top: 1px solid #21262d;
}